I don't have any imperial data confirming this, but there seems to be a large rise in the number people who have weakened and/or paralyzed left or right diaphragms or both. I am NOT a conspiracy theorist or anti vaccination activist, but I think it has to do with the rise of both COVID and the vaccinations, both of which can seriously harm the phrenic nerve. People who are having symptoms like shortness of breath, fatigue, lack of stamina, etc. should consider having a SNIFF test (fluroscopy) to determine if they have a weakened or paralyzed diaphragm. Most doctors don't seem to know much about paralyzed diaphragms, so people need to advocate for themselves.